Impact of the Sediment Organic vs. Mineral Content on Distribution of the Per- and Polyfluoroalkyl Substances (PFAS) in Lake Sediment

Dauren Mussabek, Kenneth M. Persson, Ronny Berndtsson, Lutz Ahrens, Kei Nakagawa and Tomomi Imura
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Dauren Mussabek: Division of Water Resources Engineering, LTH Lund University, 22100 Lund, Sweden
Kenneth M. Persson: Division of Water Resources Engineering, LTH Lund University, 22100 Lund, Sweden
Ronny Berndtsson: Division of Water Resources Engineering, LTH Lund University, 22100 Lund, Sweden
Lutz Ahrens: Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences (SLU), 75007 Uppsala, Sweden
Kei Nakagawa: Institute of Integrated Sciences and Technology, Nagasaki University, Nagasaki 852-8521, Japan
Tomomi Imura: Faculty of Environmental Sciences, Nagasaki University, Nagasaki 852-8521, Japan

IJERPH, 2020, vol. 17, issue 16, 1-13

Abstract: Contamination of the water and sediment with per- and polyfluoroalkyl substances (PFAS) was studied for the lake impacted by the release of PFAS-containing aqueous film forming foam (AFFF). PFAS concentrations were analyzed in lake water and sediment core samples. ΣPFAS concentrations were in the range of 95–100 ng L −1 in the lake water and 3.0–61 µg kg −1 dry weight (dw) in sediment core samples, both dominated by perfluorohexane sulfonate, perfluorooctane sulfonate; 6:2 fluortelomer sulfonate was inconsistently present in water and sediment core samples. The sediment–water partitioning coefficients (log K d ) were estimated and ranged 0.6–2.3 L kg −1 for individual perfluoroalkyl carboxylates (PFCAs) and 0.9–5.6 L kg −1 for individual perfluoroalkane sulfonates (PFSAs). The influence of the sediment inorganic content and organic matter on PFAS distribution was investigated. In studied sediments, the mineral content (corresponding to <5% of the bulk media mass) was mainly represented by sulfur, iron and calcium. The PFAS distribution was found strongly connected to the sediment mineral content (i.e., Fe, Pb, Rb and As), whereas the sediment organic carbon content did not to have a direct influence on the PFAS distribution. The aim of this study was to improve our understanding of the PFAS distribution in the natural heterogeneous media.

Keywords: PFAS; AFFF; sediment; water; distribution (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
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